<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    #z1{
      color: green;
    }
    .l1{color: blue}
    h1,h2{
      background-color: yellow;
    }
    input[type = "submit"]{ background-color: red}
    input[type = "button"]{background-color: pink}
    *{ border: 1px solid red}
  </style>
</head>
<body>
<ul>
  <li id="z1">周润发</li>
  <li class="l1">刘德华</li>
  <li>彭于晏</li>
</ul>
<h1 class="l1">悟空</h1><h1>八戒</h1><h1>唐僧</h1>
<h2>刘备</h2>
<input type="submit">
<input type="button" value="按钮">
</body>
</html>